Tutorial: Connect to an Azure Red Hat OpenShift 4 cluster

In this tutorial, part two of three, you will connect to an Azure Red Hat OpenShift cluster running OpenShift 4 as the kubeadmin user through the OpenShift web console. You learn how to:

  • Obtain kubeadmin credentials for your cluster
  • Install the OpenShift CLI
  • Connect to an Azure Red Hat OpenShift cluster using the OpenShift CLI

Before you begin

In previous tutorials, an Azure Red Hat OpenShift cluster was created. If you have not done these steps, and would like to follow along, start with Tutorial 1 - Create an Azure Red Hat Openshift 4 Cluster.

If you choose to install and use the CLI locally, this tutorial requires that you are running the Azure CLI version 2.0.75 or later. Run az --version to find the version. If you need to install or upgrade, see Install Azure CLI.

Connect to the cluster

You can log into the cluster using the kubeadmin user. Run the following command to find the password for the kubeadmin user.

az aro list-credentials \
  --name $CLUSTER \
  --resource-group $RESOURCEGROUP

The following example output shows the password will be in kubeadminPassword.

{
  "kubeadminPassword": "<generated password>",
  "kubeadminUsername": "kubeadmin"
}

You can find the cluster console URL by running the following command, which will look like https://console-openshift-console.apps.<random>.<region>.aroapp.io/

 az aro show \
    --name $CLUSTER \
    --resource-group $RESOURCEGROUP \
    --query "consoleProfile.url" -o tsv

Launch the console URL in a browser and login using the kubeadmin credentials.

Azure Red Hat OpenShift login screen

Install the OpenShift CLI

Once you're logged into the OpenShift Web Console, click on the ? on the top right and then on Command Line Tools. Download the release appropriate to your machine.

Azure Red Hat OpenShift login screen

You can also download the latest release of the CLI appropriate to your machine from https://mirror.openshift.com/pub/openshift-v4/clients/ocp/latest/.

If you're running the commands on the Azure Cloud Shell, download the latest OpenShift 4 CLI for Linux.

cd ~
wget https://mirror.openshift.com/pub/openshift-v4/clients/ocp/latest/openshift-client-linux.tar.gz

mkdir openshift
tar -zxvf openshift-client-linux.tar.gz -C openshift
echo 'export PATH=$PATH:~/openshift' >> ~/.bashrc && source ~/.bashrc

Connect using the OpenShift CLI

Retrieve the API server's address.

apiServer=$(az aro show -g $RESOURCEGROUP -n $CLUSTER --query apiserverProfile.url -o tsv)

Login to the OpenShift cluster's API server using the following command. Replace <kubeadmin password> with the password you just retrieved.

oc login $apiServer -u kubeadmin -p <kubeadmin password>

Next steps

In this part of the tutorial, you learned how to:

  • Obtain kubeadmin credentials for your cluster
  • Install the OpenShift CLI
  • Connect to an Azure Red Hat OpenShift cluster using the OpenShift CLI

Advance to the next tutorial: